JPS60215848A - Wefting control of shuttleless loom - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a control method for selectively inserting a plurality of weft yarns supplied from a plurality of weft supply units based on a weft selection program.

BACKGROUND OF THE INVENTION In recent years, there has been a search for a loom that can freely and easily weave a wide variety of multicolored fabrics. In such a loom, a plurality of weft yarns supplied from a plurality of weft supply sections are selectively inserted by a weft selection mechanism that is operated based on an electrical activation signal from a weft selection control device that stores a weft selection program. .

For example, in a rapier loom, this weft selection mechanism consists of a plurality of electromagnetic solenoids corresponding to each weft supply section and a plurality of weft selection levers operated by each solenoid.
Any one of the plurality of wefts supplied from the plurality of weft supply units is selected and arranged within the movement locus of the rapier by the weft selection lever, and is gripped and inserted by the rapier.

Such a weft selection mechanism has a much better degree of freedom in selecting wefts than a weft selection means using a weft selection mechanism mechanically linked to the machine stand. However, in the weft selection IJI If, which is mechanically linked to the machine stand, the mechanism and the machine stand are always synchronized, and there was no problem that the weaving pattern was different from the desired weaving style, but the electrical activation signal In the means for carrying out a weft selection program based on this, if the machine is turned by hand after the power is turned off, the phase between the machine and the weft selection mechanism will shift, and if operation is restarted in this state, the desired result will not be obtained. There is a problem in that a weave pattern that is different from the weaving method is produced. This type of situation also occurs when a power outage occurs while the loom is in operation. In other words, when the machine is stopped, the machine is operated by inertia for one rotation or more in order to prevent damage to each part, so the phase between the machine and the weft selection Ia mechanism is shifted in the same way as described above. be.

Purpose The present invention has been made in consideration of the above-mentioned problems, and its purpose is to prevent weaving errors by stopping a sharpening machine table in which the opening pattern of the belt frame and the weft insertion pattern are out of phase. An object of the present invention is to provide a method for controlling weft insertion in a shuttleless loom.

Structure of the Invention In order to achieve the above object, the present invention extracts the drive pattern of at least one belt frame among the plurality of belt frames constituting the shedding device as an electrical warp-to-warp robot pattern signal, and synchronizes it with the weft selection program. The set warp-to-warp donkey pattern and the warp-to-warp donkey pattern taken out are compared, and when the two patterns do not match, the machine is stopped.

EXAMPLE Hereinafter, an example in which the present invention is embodied in a fluid injection type loom will be described based on the drawings. Reference numeral 1 indicates one of a plurality of belt frames, and a jack lever 3 is moved by a spring 2. It is suspended by a rope 4 which is tension-biased through the cable. The frame 1 moves up and down, that is, opens, through the cam lever 6, the connecting lever 7, and the connecting rope 8 by the cam action of the cam plate 5, which is rotated in synchronization with the drive shaft of the loom. There is.

Note that 30 is a guide roller for guiding the ropes 4 and 8.

In this embodiment, the cam plate 5 shown in FIG.
The belt frame 1 rotates 115 times relative to the rotation, and the belt frame 1 is in the upper open position shown by the solid line in the open diagram for 4 rotations of the machine base, and then in the lower open position shown by the open chain line for 1 revolution of the machine base. in the open position.

Five rotations of the machine table correspond to one cycle of the weaving pattern.

A proximity switch 9 is located near the lower opening position of the belt frame 1.
is marked with a setting number, and outputs a predetermined signal when the belt frame 1 is in the lower opening position.
A pair of weft insertion main nozzles 10 from the air tank 50.
a pair of solenoid valves 12.1 controlling the fluid supply to 11;
The signal is input to a weft selection control device 14 that controls the opening and closing operations of the weft threads 3.

As shown in FIG. 2, the weft selection control device 14 is composed of a central processing unit CPLJ, a read-only memory ROM, and a readable and rewritable memory RAM.
AM includes the number of colors (numbers assigned to each of multiple weft supply sections), set pick number (number of times weft insertion is performed in one weft supply section), and number of steps (number of colors in one cycle of weaving pattern). and the order in which the number of picks were stored), that is, a weft selection program is stored, and in synchronization with the program, the inter-setting robot pattern of the belt frame 1 is stored.

These data are input by operating buttons on the operation panel 15, not shown in FIG.
6 (for example, button 16a), 1 is displayed on the color number display section 17, and at the same time, 1 is displayed on the step number display section 18. Next, press the pick number operation button 19 according to the set number of picks (4 in this example).
If you press the button 19a, 4 will appear on the pick number display section 20.
is displayed. Then, the opening position instruction number operation button 21
When the O- button is pressed, O corresponding to the OFF signal of the proximity switch 19 is displayed on the opening position instruction number display section 22, and the data displayed on the display sections 17, 18 and 20, 22 is stored in the RAM. be done. Subsequently, when the color matching operation button 16b is pressed, the number 2 is displayed on the display section 17, and at the same time, the number 2 is displayed on the display section 18. Next, when the button 19b is pressed in accordance with the set pick number (1 in this embodiment), 1 is displayed on the display section 20. Then, when the 1- button of the opening position instruction number operation button 21 is pressed, 1 corresponding to the ON signal of the proximity switch 19 is displayed on the display section 22, and 1 is displayed on the display sections 17, 18, 20° 22. Data is stored in RAM.

That is, the weft selection program shown in FIG. 3 and the set weft pattern are input and set in the RAM in synchronization.

The weft selection control device 14 is configured to receive a timing signal from the machine rotation angle detection device 23, and in response to the timing signal, the CPU causes the RAM to count the signal as data (hereinafter referred to as , this count number is called the count pick number) and various data in the RAM are read out and an operation control signal is issued to the electromagnetic valve 12.13, and the set opening pattern is compared with the opening pattern signal from the proximity switch 9. If the two do not match, a machine stop signal is issued to the machine control section 24. Then, with the operation of l1iIa, the count pick number is updated in the RAM, and the number displayed on the display section 17, 18, 20° 22 is sequentially updated according to the weft selection program and the set amount robot pattern. With the update of the count pick number, for example,
Solenoid valve 1 from color number 1 corresponding to solenoid valve 12
When the number of colors corresponding to 3 is updated to 2, solenoid valve 1
The opening operation of 2 is switched to the opening operation of the electromagnetic valve 13.

The operation button 25 is used to add or change the count pick number in the RAM and the number displayed on the display sections 17, 18, 20, and the operation button 26 is used to subtract or change the number.

Now, if the loom is being operated in a state where the set open rotor pattern and the actual open rotor pattern are synchronized, the count pick number is updated, and each display section 1
The displayed numbers of 7.18.20.22 are sequentially updated according to the weft selection program and the inter-setting robot pattern. However, when it becomes necessary to adjust the machine during operation, for example, in order to adjust the position of the front of the woven fabric, the machine is stopped and the machine is turned by hand with the power turned off, as shown in Figure 3. de1
When the machine is restarted after rotating forward and adjusting the weaving cloth position, if the machine stops immediately after the number of picks 5, that is, after the 5th pick in one weaving pattern cycle, the machine When the machine is restarted, it is performed immediately after pick number 6, that is, from the second pick in one weaving pattern cycle, but the set weft thread selection program does not work when the power is turned off and the machine is turned by hand.
Since the memory RAM does not update the counted pick number, the picking is performed from the first pick in one cycle of the weaving pattern.

i.e. set between lobe turn and belt frame 1
The actual lobe pattern is in a misaligned state. If machine operation continues in this state, the 4th pick after restarting the machine,
When the opening pattern set in the pick number 10 is in the upper opening state, the actual opening position of the belt frame 1 is in the lower opening state. Therefore, the CPU detects the deviation between the opening lever pattern set for the fourth big after restarting the machine and the actual opening lever turn based on the gapping lever turn signal, and sends a machine stop command to the machine controller 24.

After the machine is stopped, the machine is reversed until just before the pick number 6 shown in Fig. 3 is reached, and the wefts that fall into the pick numbers 6 to 11 are removed from the woven fabric, and the count pick number stored in the memory RAM is If you reset it to a position that synchronizes with the machine base, the set opening lever pattern will match the actual opening lever pattern. If the machine is restarted from this state, weaving will be performed in accordance with the weft selection program and the set opening pattern.

Note that it seems that it is only necessary to reverse the machine until just before the abnormality detection position, that is, just before the pick number 10, but this only applies to belt frame 1 and does not apply to the opening of other belt frames. Considering the phase shift of the robot turn, it is necessary to reverse the machine as in this embodiment until immediately before the first machine stop position, that is, immediately before the pick number 6.

As described above, in this embodiment, the preset lever pattern and the actual open lever pattern are compared based on the open lever pattern signal from the proximity switch 9 installed near the lower opening position of the belt frame 1, and if the two deviate from each other, Since the machine is stopped immediately, the set open pattern and the actual open pattern do not deviate from each other during weaving, and fabric with a different weave pattern than the desired weave pattern is woven. There is no risk of it being woven. Note that when the machine is rotated by hand in the forward direction as shown in FIG. 3, if the operation button 25 is pressed and the count pick number is incremented by one, the set opening lever pattern will match the actual opening lever pattern after that, but If the machine is restarted in this state, the weft with the pick number 6 will not be woven into the woven fabric, so there will be a phase shift between the set interlock pattern and the actual open pattern as described in this example. That is, the phase difference between the weft selection program and the actual open pattern cannot be dealt with simply by changing the number of count picks, and the desired woven fabric cannot be obtained.

Furthermore, even if there is a power outage during weaving, the same phase shift as described above will occur based on the inertial operation of the loom over one revolution, but the loom will also start moving based on the loom shift signal from the proximity switch 9 in the same manner as described above. will be stopped.

If a weft insertion error occurs, the machine must be reversed to remove the misplaced thread woven into the woven fabric, but after the machine is reversed and the misplaced thread is removed, the number of machine reversals will be reduced. By reducing the number of count picks, the set weft pattern will match the actual weft pattern, and if we restart the machine in this state, weaving will be possible without the problem of missing wefts as mentioned above, and the weft selection program and weft pattern will match. It is carried out according to the set schedule. However, when a weft insertion error occurs, if the operation to change the count pick number is not performed automatically and must be done manually, there is always the risk of forgetting this operation or making a mistake in changing the count pick number. Even if such an operation is forgotten or a change error is made, according to the present invention, the machine can be stopped and the weaving error can be prevented.

It should be noted that the present invention is not limited to the above-mentioned embodiments. For example, open heave pattern signals may be extracted from two or more belt frames. A phase shift with the robot pattern can be detected more quickly. Such early detection of phase deviations can reduce the number of times the machine is reversed for phase alignment, thereby shortening the time required for the complicated weft removal operation. It is also possible to use a photoelectric device instead of a proximity switch as a device for extracting the open pattern signal. Such a device is installed at an appropriate position such as the upper opening position of the belt frame (= near I, on the side of the belt frame, or near the drive system of the cam 5, cam lever 6, connecting lever 7, jack lever 3, etc.) It is also possible.

Furthermore, the present invention can be embodied in shuttleless looms other than fluid jet looms, such as rapier looms and gripper looms.

Effects As detailed above, the present invention detects the phase shift between the machine stand side and the weft selection mechanism side at an early stage in a loom that controls the operation of the weft selection mechanism based on electrical signals, and prevents weaving errors. It has an excellent effect of obtaining.

[Brief explanation of the drawing]

The drawings show an embodiment embodying the present invention, FIG. 1 is a schematic front view showing an operation panel for inputting data to a shedding device and a weft selection control device, and FIG. 2 is a weft i selection control device. FIG. 3 is a diagram showing the weft selection program and weft pattern, and FIG. 4 is a flowchart of weft insertion control. Belt frame 1, proximity switch 9, main nozzles 10, 11 as weft selection mechanism, electromagnetic valves 12, 13 also as weft selection mechanism, weft selection control device 14゜Patent applicant: Toyota Industries Corporation, Attorney Shien 1) Hironobu

Claims (1)

[Claims] The drive pattern of at least one belt frame among the plurality of belt frames constituting the shedding device is taken out as an electric warp-to-warp robot pattern signal, and the warp-to-warp robot pattern set in synchronization with the weft selection program and the warp pattern to be taken out are extracted as an electric warp-to-warp robot pattern signal. A method for controlling weft insertion in a shuttleless SUI, characterized by comparing the two patterns and stopping the machine when the two patterns do not match.